Top PDF A Parallel Evolution Strategy for Acoustic Full-Waveform Inversion
A Parallel Evolution Strategy for Acoustic Full-Waveform Inversion
... Motivated by the recent growth of high performance computing HPC, we will try to tackle the high non-linearity of the problem to minimize, using global optimization methods which are eas[r] ...
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A Parallel Evolution Strategy for an Earth Imaging Problem in Geophysics
... model for FWI [34, 45]. In this paper we propose a novel approach to find an initial smooth velocity model for the full-waveform inversion problem without any a priori ...
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Efficient 3-D frequency-domain mono-parameter full-waveform inversion of ocean-bottom cable data: application to Valhall in the visco-acoustic vertical transverse isotropic approximation
... allow for the computationally-efficient processing of a large number of sources and receivers with limited computational resources thanks to the efficiency of the substitution step performed by the ...
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Soil surface water content estimation by full-waveform GPR signal inversion in the presence of thin layers
... also aect the utilizable ...Measurements for higher frequencies were also in uenced to some extent by the inherent heterogeneities present in the sandbox, including slight surface rough- ...ness. ...
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FullAnalyze: a Research Tool for Handling Processing and Analyzing Full-waveform Lidar Data
... ON FULL-WAVEFORM LIDAR DATA Airborne lidar systems (ALS) provide 3D point clouds of the topography by direct time measurement of a short laser pulse after reflection on the Earth ...surface. ...
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PRT: Parallel program for a full backtranslation of oligopeptides
... as a high throughput technology need efficient primers or probes ...only a small part of the microbial diversity is known, gene sequences deposited in international databases do not reflect the entire ...
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The potential of time-lapse GPR full-waveform inversion as high resolution imaging technique for salt and ethanol transport
... promising for GPR techniques. In this regard, this abstract shows first a synthetic ethanol tracer test monitored by GPR ...using a realistic aquifer model of the Krauthausen test site in Germany [6, ...
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Two-dimensional elastic full waveform inversion using Born and Rytov formulations in the frequency domain
... in a 2-D medium using either single-component data or multicomponent ...domain full wave equation by a finite difference scheme different from the one already used by Stekl & Pratt (1998) or by ...
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Two-dimensional elastic full waveform inversion using Born and Rytov formulations in the frequency domain
... anomalies for the V p and V s ...as a series of independent simple ...as a series of neighbouring hyperbolae due to the presence of simple ...seismograms for the vertical component, a ...
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Approximate Effects of Off-Center Acoustic Sondes and Elliptic Boreholes Upon Full Waveform Logs
... In order to determine a reasonably high upper limit for the effects of stress relaxation or a minor amount of hole deterioration, a synthetic seismogram was generated for an elliptic bor[r] ...
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A Reconfiguration Strategy for Reconfigurable Cable-Driven Parallel Robots
... A Reconfiguration Strategy for Reconfigurable Cable-Driven Parallel Robots Lorenzo Gagliardini 1 , Stéphane Caro 2 , Marc Gouttefarde 3 and Alexis Girin 1 Abstract— This paper deals with ...
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Two-dimensional near-surface seismic imaging with surface waves : alternative methodology for waveform inversion
... For inversion 3, the initial velocity models are the same as for inversion 2 (Figure ...compensate for the strong density ...similar for P-P diffractions at short ...showing ...
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Processing Full-Waveform Lidar Data: Modelling Raw Signals
... systems, full-waveform systems are able to digitize and record the entire backscattered signal of each laser ...into a mixture of Gaussian components was ...to waveform processing was ...as ...
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Acoustic Waveform Logging - Advances In Theory And Application
... cation in recent years, and these advances have greatly increased the capability of log analysts to measure the physical properties of formations. Advances in theory provide the analytic[r] ...
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A Parallel Full Geometric Multigrid Solver for Time Harmonic Maxwell Problems
... where a mesh, that approximates sufficiently the geometry, is not fine enough to comply with numerical and physical constraints associated with the PDE to be ...seismic-imaging for oil reservoir research ...
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Full-waveform redatuming via a TRAC approach: a first step towards target oriented inverse problem
... redatuming, a target oriented approach which consists in reducing the inverse problem to a smaller region of interest, is very ...to a new ...inadequate for imaging pur- poses ...requires ...
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A Strategy for Parallel Implementations of Stochastic Lagrangian Simulation
... with a standard error S.E. = 0.0011 and a confidence interval ...Moreover, a good efficiency ...in a simulation, then the code has a bug and a replay of a selection of few ...
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Modelling full waveform Lidar data on forest structures at plot level : a sensitivity analysis of forest and sensor main characteristics on full-waveform simulated data
... Conclusion Different ways to simulate forest canopies used in a radiative transfer model have been tested. Each representation needs different inputs and calibration efforts, and produces virtual scenes with ...
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Application of full waveform acoustic logging data to the estimation of reservoir permeability
... Development of borehole geophysics has recently focused on reservoir characterization. Within this effort, extensive full waveform acoustic surveys have demonstrated a [r] ...
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Speed up and regularization techniques for seismic full waveform inversion
... ■♥✈❡rs✐♦♥ ♠✉❧t✐✲♣❛r❛♠ètr❡s ▲❡s ❜é♥é✜❝❡s q✉❡ ❧✬♦♥ ♣❡✉t t✐r❡r ❞❡ ❧❛ ♣r✐s❡ ❡♥ ❝♦♠♣t❡ ❞✉ ❍❡ss✐❡♥ s✬❛♣♣❧✐q✉❡♥t ❛✉ss✐ ❛✉① ✐♥✈❡r✲ s✐♦♥s ♠✉❧t✐✲♣❛r❛♠ètr❡s✳ ▲❡s ❛♣♣❧✐❝❛t✐♦♥s ♣✐♦♥♥✐èr❡s ❞❡ ❧❛ ❋❲■ ♠✉❧t✐✲♣❛r❛♠ètr❡s ♦♥t ♠♦♥tré q✉❡ ❧❛ ...
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